Borderline personality disorder is a diagnosis often given to those who have serious problems with self-image and mood, as well as with interpersonal relations. This text presents a journal of a 15-month course of therapy with a classic splitting borderline patient, followed by an in-depth analysis of the case from three very different, but ultimately converging, perspectives. While there is a large and growing literature on borderline personality disorder, Anatomy of a Splitting Borderline is the first book-length study of a borderline patient, expressly revealing facets of this mental illness and its therapeutic challenge that could only be summarized in previous, briefer case histories. Psychiatrists, psychoanalysts, psychologists, social workers, and those in training in these professions are the audience for this ground-breaking book.